/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.graphics;

import android.content.Context;
import android.graphics.*;
import android.os.Bundle;
import android.view.*;

public class Layers extends GraphicsActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {
		private static final int LAYER_FLAGS = Canvas.MATRIX_SAVE_FLAG
				| Canvas.CLIP_SAVE_FLAG | Canvas.HAS_ALPHA_LAYER_SAVE_FLAG
				| Canvas.FULL_COLOR_LAYER_SAVE_FLAG
				| Canvas.CLIP_TO_LAYER_SAVE_FLAG;

		private Paint mPaint;

		public SampleView(Context context) {
			super(context);
			setFocusable(true);

			mPaint = new Paint();
			mPaint.setAntiAlias(true);
		}

		@Override
		protected void onDraw(Canvas canvas) {
			canvas.drawColor(Color.WHITE);

			canvas.translate(10, 10);

			canvas.saveLayerAlpha(0, 0, 200, 200, 0x88, LAYER_FLAGS);

			mPaint.setColor(Color.RED);
			canvas.drawCircle(75, 75, 75, mPaint);
			mPaint.setColor(Color.BLUE);
			canvas.drawCircle(125, 125, 75, mPaint);

			canvas.restore();
		}
	}
}
